In 2024, I made a Mario platformer engine that I could use for my games. However, I only used it for a couple of games (which were cancelled), SMB.NL, and it was replaced with the engine I'm using for MSLW. This was also my first attempt of making an engine without using someone else's, though I used @griffpatch's basic scrolling platformer tutorial first. You can walk, jump, crouch, triple jump, and long jump in this engine. Backward-long-jumps are also possible, see if you can find out how to do it! Feel free to remix this and make it into your own game!